FLOOD04416

• Designation Number: 304
• County: Adams
• Community: Unincorporated Adams County
• Stream Name: Big Dry Creek, (ADCO), North area tributaries
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Big Dry Creek, ADCO, North Area Tributaries
• Date: 7/1/1989
• Designation Date: 1/1/1990
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE IV-1
FLOOD HAZARD DATA FOR 100-YEAR STORM (CO NT...)

~IU
5ItIlY DI1tH
Fl ood1 ng SalI"Ce lQO-j.ear Fl"",*>lafn Data Fl~ Data Flood1ng SalI"Ce lQO-j.ear Fl"",*>lain Data Fl 0lld0IiIl' Data
Fl~Width 3 FlOO<loo\ylltdth 3
l00-year 'Thalweg Flood Fl~ l00-)9r 'Thalweg Flood Fl"",*>laln 19loc1t,l Fl~
Identification Statlonl Dischal'1lE! Elevation Elevation Fl"",*>lain veloc1ti Left Ri!tlt Total 191.4 Elevatioo Identification Stationl Oi sehal'1lE! El evati on Elevation Left Rl!tlt Total 191.4 Elevation
(efs) (MSl) (MSl) Width (ft) (fps) (feet) (feet) (feet) 1fE!l (MSl) (efs) (MSl) (MSl) lItdth (ft) (fps) (feet) (feet) (feet) ~ (MSl)
4+70 2450 5119.0 In Bi9 Dry Creek Fl"",*>lain 28J 330 610 2.5 5121. 2 4+1:6 2100 5102.1 In Big Dry Creel< Fl"",*>laln 8J 120 200 7.9 511:6.4
12i40 245J 5123.0 5126.2 1300 1.6 240 190 430 6.1 5126.2 9+m 2100 5109.0 5112.9 170 6.9 40 8J 120 6.9 5113.3
17i40 245J 5131.0 5132.4 660** 5.0 160 160 320 5.2 5132.8 14+!ll 2100 5115.8 5120.9 170 7.9 !ll !ll 100 9.2 5120.9
22+10 2450 5137.0 5139.7 410** 7.4 100 70 170 8.3 5139.8 2Ot05 2100 5121.2 5126.8 110 5.7 30 !ll 8J 5.8 5127.1
27+10 24!ll 5142.0 5144.8 600 5.3 8J 230 310 4.8 5145.0 25+00 2100 5132.0 5135.4 170 7.8 30 60 90 9.0 5135.5
Washingtoo St. 27+70 1890 5142.5 5149.5 370 2.7 70 2!ll 320 2.7 5149.5 29+85 2100 5136.1 5140.9 230 4.8 70 m 130 4.8 5141.2
28+20 1890 5143.0 5149.5 !ill) 0.9 120 310 430 1.0 5149.5 34+15 2100 5149.8 51!ll.3 400 5.8 140 120 2&:l 6.4 51!ll.7
31+95 1890 5146.0 5149.0 120 8.3 30 70 100 8.9 5149.0 39<25 2100 5149.5 5153.4 28J 3.3 8J 100 18J 3.2 5153.7
39+00 1890 5153.0 5158.0 170 5.2 40 70 110 5.4 5158.3 Washi ngton St. 39+85 2100 51!ll.2 5158.6 400 2.5 2!ll 140 390 2.5 5158.6
44+55 1890 5158.0 5162.0 1!ll 6.3 45 40 85 6.7 5162.2 4Ot3O 2100 51!ll.5 5158.6 4m 1.3 240 130 370 1.3 5158.6
49+25 1890 5161.0 5165.9 155 5.4 25 55 8J 5.9 5166.3 43t70 2100 5156.2 5158.9 200 7.3 90 !ll 140 8.1 5159.0
Bull Canal 52+20 1890 5172.5 5173.7 310 3.3 100 100 200 6.8 5174.0 48+85 2100 5156.0 5162.4 1m 4.0 40 60 100 4.3 5162.8
57+10 1890 5170.0 5175.8 210 2.5 100 110 210 2.4 5176.3 53>9D 2100 5160.1 5165.0 130 8.9 40 40 8J 9.9 5165.0
59+00 1470 5175.8 5176.1 195 2.9 90 70 1m 3.1 5176.5 DIJn 58+00 2100 51n.8 5178.0 4m 4.9 220 140 360 5.6 5178.3
1-25 63+55 1470 5176.2 5196.4 19m 0.2 410 370 78J 0.2 5197.4 DIJn 62+35 2100 5181.9 5183.4 670 2.9 2m 120 m 2.6 5183.8
70+10 1470 5184.8 5196.4 710 0.5 160 l!ll 310 0.4 5197.4 68+95 2100 5181.5 5185.7 28J 3.1 130 110 240 3.0 5186.0
75+70 1470 5190.0 5196.4 240 1.9 !ll 70 120 2.1 5197.4 1-25 70+20 1800 5182.1 5199.8 78J 1.8 270 490 7m 1.8 5199.8
81+45 1470 5197.0 5199.5 230 7.0 60 40 100 8.1 5199.5 71+30 1800 5182.7 5199.8 2000 0.2 270 !llD 770 0.3 5199.8
861-70 1470 521:6.4 5209.5 230 6.8 40 30 70 6.6 5209.8 74+60 1800 5190.6 5199.8 1140 0.4 300 300 600 0.4 5199.8
89>10 11!ll 5200.0 5213 .1 510" 5.2 210 310 520 5.2 5213.1 foIlstang Run 79+10 1800 5193.8 5199.8 1140 0.7 130 230 360 1.1 5199.8
IlJron St. 89+45 1150 5209.0 5216.9 540 1.6 210 330 540 1.6 5216.9 North Confl u . 85+10 1070 5200.0 5202.1 1!ll 6.3 40 45 85 7.4 5202.3
89+70 11!ll 5210.9 5216.9 910 1.2 190 330 520 1.4 5216.9 9Qf85 1070 5207.5 5211.3 100*" 5.5 30 40 70 5.7 5211.6
94+50 11!ll 5219.5 5220.9 200 6.2 90 10 100 7.2 5221.0 96+65 1070 5222.0 5225.1 320** 5.8 165 11:6 270 6.2 5225.1
100+30 610 5226.5 5227.9 370 2.4 !ll 90 140 3.0 5228.3 IlJron St. 97+00 940 5222.2 5226.8 360 1.6 230 130 360 1.6 5226.8
103+m 610 5231.8 5232.0 4m 1.4 8J 100 18J 4.8 5232.1 97+35 940 5222.3 5226.8 m 1.7 230 120 3!ll 1.7 5226.8
107+10 610 5237.5 5238.3 320 3.8 85 90 175 3.8 5238.8 102+65 940 5232.0 5233.8 120 6.3 40 35 75 7.4 5233.9
113+!ll 610 5246.0 5248.4 140 3.3 60 60 120 5.1 5248.6 107+70 940 5238.2 5241.1 1!ll 5.4 !ll 30 8J 5.9 5241.3
118+70 610 5256.0 5257.1 2&:l 4.2 50 90 140 4.0 5257.3 112+8) 7!ll 5246.8 5248.3 2!ll 4.8 8J 60 140 5.4 5248.4
122+85 610 5259.8 5262.1 210 3.5 !ll 40 90 4.6 5262.2 118+10 7!ll 5251.0 5253.7 120 3.6 30 !ll 8J 4.5 5253.8
128+70 610 5270.2 5271.9 190 5.2 70 60 130 5.8 5272.1 l2JlOO 750 5261.5 5263.5 11:6 6.2 !ll 10 m 7.4 5263.7
135+1:6 610 5284.0 5285.3 370 3.3 70 130 200 3.6 5285.3 124+20 7!ll 5266.0 5267.3 3!ll 4.6 110 70 18J 5.2 5267.4
14Ot35 610 5296.2 5296.6 530 3.1 70 130 200 4.7 5296.9
146100 610 5306.0 5306.7 520 2.4 60 440 !llD 2.4 5306.7 Notes : 1. Distance fran eoofluerce along chamel reference 11...
ZlJnl 146+30 610 5307.5 5308.2 510 3.5 m 4!ll 510 3.5 5308.2 2. I'ean velocl~ in chamel.
3. Fran ehamel reference 11.. looking __.
Notes : 1. Oistance fran confluerce along chamel reference 11... 4. I'ean vel oc1 ty 1 n fl ocxWiIY .
2. I'ean veloci~ in chamel.
3. Fran chamel 'ef...."" 11.. looking -'stream. * Fl"",*>laln width Includes area of hydrau11cally dfsco.,leCtl!d fl....
4. Mean veloc1~ in flOlldolill'. .. Floodplain width d:les not include area of hy_11cally dfseonnected fl....
* Fl"",*>lain width includes area of I]ydraulically dfscomected fl....
.. Fl"",*>laln width <Des ~ lncllJde a..... of 1]y<rau11cally dfseonnected fl....